A 33" sink can fit in a 42" corner sink base, but it's around 6" from the front, which is really hard on the back. You'll need a 48" sink base if you don't want to scoop the sides or have the sink be too far back from the edge. Scooping the sides is a bad idea on a corner sink base as it's very light on support as is.

Corner sinks take up a LOT more room than do ones on the straight, and then only one person can use them at a time. If there's any other location for it, I'd try for that.

Thanks GreenDesigns. You're a great source of information for both my kitchen and bath remodel!